Since 43 > 40, the dude on the left is bigger: 43.56 > 40.78.
Example 2
Which number is bigger: 2.34799 or 2.34891?
These numbers have the same values in the ones, tenths, and
hundredths places. They first differ in the thousandths place, and the
second number has a bigger value there. This means the second number is
bigger than the first. Just barely, but that probably won't keep the
first number from lording that fact over the second number for years to
come.